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280 AMD Geode™ LX Processors Data Book
Display Controller
33234H
The VGA block, shown in Figure 6-14, provides hardware
support for a compatible VGA solution. It consists of an
independent CRT controller and pixel formatting units. It
also provides the standard VGA host memory data manip-
ulation functions such as color compare, set, reset, etc.
This block provides complete support for all VGA text and
graphics modes.
Figure 6-14. VGA Block Diagram
CRTC Pixel Formatter
Shared FIFO
FIFO Control
Syncs
DISPEN
Syncs
DISPEN
8-bit Pixel
Clock Control
Display Memory I/F Control
Display Memory I/F Data
FIFO R/W Data
FIFO Control
FIFO Read Data
VGA DAC I/O Unit
Host Memory I/F Unit
Host CPU I/F
GUI CLUT I/O Control
Host Memory I/F